Proceedings Paper

We have developed a high precision three axes scanning and positioning system for integration with
Multifunctional Image Guided Surgical (MIGS) Platform. The stage integrates three main components: an optical
coherence tomography (OCT) probe, laser scalpel and suction cup. The requirements for this stage were to provide
scanning area of 400mm2, resolution of less than 10 microns and scanning velocity in the range of 10 - 40 mm/s.
The stage was modeled using computer aided design software NX Unigraphics. In addition to the parameters
mentioned above, additional boundary conditions for the stage were set as low volume and modularity. Optimized
stage model was fabricated by using rapid prototyping technique that integrates low cost stepper motors, threaded
rod drive train and a stepper motor controller. The EZ4axis stepper motor controller was able to provide 1/8th microstep
resolution control over the motors, which met the criterion desired for the MIGS platform. Integration of
computer controlled three-axis stage with MIGS platform provides the opportunity for conducting intricate surgical
procedures using remote control or joystick. The device is image guided using the OCT probe and it is able to pin
point any location requiring a laser scalpel incision. Due to the scanning capabilities, a high quality threedimensional
image of the tissue topography is obtained which allows the surgeon to make a confident decision of
where to apply the laser scalpel and make an incision.